Firstly, you need tell us what kind of plastic bags you need. Details are below:

Style: Enclosing an picture is best.
Material:     
Size: Please point out the size of different part. For example, the adhesive header bag: 3(header)+ 5(wide)x7(length) +2.5(flap)

Thickness:   
Printing: How many colors on you bag? [ The Cylinder Cost  is up to this ]
Quantity: An exact number or MOQ? 

PS: The more bags you need, the more discount you get.
If you are not sure about some information, we can give you some suggestions.

We often quote on FOB Shenzhen (by sea), but you can make other transportation ways, such as by air, by express.